Molding-machine.



PATENTED JUNEISO, 1903.

W. T. CLARK.

MOLDING MACHINE. nrmoynon rum) nov. a, 1901.

Id MODEL.

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- By his Allomey;

UNITED STATES Patented June 30, 1903.

PATENT OFFIC WILLIAM THOMAS CLARK, or sOHENEcTADY, :NEwYORK, ASSIGNOR TO THE TABOR MANUFACTURING COMPANY, F PHILADELPHIA, PENN- SYLVANIA, A CORPORATION OF NEW JERSEY.

MOLDING-MACHINE.

SPECIFICATION forming part of Letters Patent N 0. 732,276, dated June 30, 19 03.

Application filed November 9, 1901. Serial No. 81,648. (No model.)

T or whom it may concern.-

Be it known that I, WILLIAM THOMAS CLARK, a citizen of the United States, and a resident of Schenectady, in the county of Schenectady and State of New York, have invented a certain new and useful Improvement in Molding-Machines, of which the following is a specification.

The present invention relates to that class of molding-machines wherein the patterns are mounted or fixed upon plates, and more especially to that class of molding machines wherein automatic rappers or vibrators are employed to prevent the adhesion of the sand to the pattern during the operation of drawing the pattern or of separating pattern I and mold.

In molding-machines of the general type above referred to the pattern has heretofore been made fast .to a metal plate of a thickness such that the plate does not bend or sag during the operation of ramming the sand thereagainst by power or otherwise, the plate being supported at or near its edges only and not elsewhere. Metal pattern plates or carriers are expensive to make and are heavy and inconvenient for handling. When an automatic rapper or vibrator is used in connection with such a pattern-carrier it is either connected directlyto the pattern-carrier or to a frame which underlies and is rigidly connected to the carrier, and the Whole is arranged to have a small bodily motion during the time the automatic rapper is in operation, whereby the sand is prevented from adhering to the patterns.

The general type of machine above referred to is illustrated in Letters Patent of the United States of America dated January 29, 1895, and May 11, 1897, and respectively numbered 533,401 and 582,325.

The primary Object of the present invention is the use of wooden instead of metal pattern plates or carriers, and another object is to use the automatic rapper or vibrator in conjunction with such wooden pattern-carriers.

The invention consists of certain constructions, parts, arrangements, improvements, and combinations of devices hereinafter de- Figs. 3 and 1 are respectively top and vertical sectional views of another modification.

In the drawings, the reference 1 designates a vertically-arranged hollow cylindrical piston which is suitably and immovably supported upon a floor or elsewhere; 2, an openbottom hollow cylinder fitting over said piston and having its top closed by the platform or head 3, which is made fast to the cylinder; 4, standards fast to a base and acting as guides for arms 6, which are integral with and which stand out horizontally fromthe base of the cylinder 2; 5, horizontal arms projecting from the cylinder 2 near its upper end; 7, caps connected with arms 5 and fitting over the upper ends of the standards 4:; 8, tubes extending from the caps 7 to the arms 6 and surrounding the guides i; 10, a port for the admission of fluid-pressure to the cylinder 2, said port passing through the piston 1 and opening beneath the head 3; 11, fingers rigidly connected with the rectangular margin of the head 3, saidfingers standing vertically; 12, a flask-supporting frame resting upon but not otherwise connected with the said fingers 11; 17, standards rigidly connected with the arms 5 and standing uprightunder the open frame 12 18,'tubes fitting on the guides 17 and rigidly attached to the frame 12; 20, an open frame of metal, usually rectangular in outline, which is connected to the head. 3, as set forth in said Letters Patent No. 582, 325, or otherwise, as in said Letters Patent No. 533,401that is, head 3 and frame 20 do not have relative motion. The frame 20 lies below the level of the open frame 12 when the parts are in position for the ramming operation.

The parts thus far described are not novel per 86, being substantially the same as the like-numbered parts in Letters Patent numbered 582,325 aforesaid, to which reference is made.

The reference a marks a wooden board or pattern-carrier to which the patterns (not shown) are attached in any suitable manner. The board a may be in one piece or it may be made up of two or more pieces suitably joined together, and it is preferably made waterproof.

b designates a metal plate or open framing 011 which the carrier a rests and by which the carrier a is held against flexing during the ramming operation, and c designates metal standards screwed into or otherwise attached to the cylinder-head 3 and to the upper ends of which the support or reinforce b is attached by suitable means.

24 marks a set of fingers, preferably integral with the fingers 11, on which the frame 20 rests; 25, the cylinder of an automatic rapping engine or-vibrator, which engine may be of known construction and operation (see Letters Patent No. 533,401 aforesaid, Figs. 9 and 10) and which, therefore, need not herein be shown in detail. 33 marks a stool-plate on which stools (not shown) may rest in a known manner, the plates a I) being perforated to afford free passage to the stoolsin a manner well known in the art, and the plate 33 being perforated to allow the posts 0 to pass freely therethrough; 3i, hangers by which the stool-plate is suspended from the frame 12.

Inasmuch as the remaining parts of the molding-machine may be of known construction and operation, they have not been illustrated herein.

In the operation of the machine the pattern-support a is supported against fiexure during the ramming of the sand by the plate or frame I) and the posts 0, as well as at the edges by the frame 20, whereby the force of the blows in ramming by hand or power or in squeezing is transmitted to the head 3 or the framework of the machine. The general operation of the machine is similar, with the exceptions noted, to that of the machine illustrated in Patent No. 582,325, above mentioned, and need not be herein further explained.

In the modification illustrated at Fig. 2 the wooden plate a is rabbeted at its edges and set down over but inside of an open metal frame 20, which is or may be held by and movable along vertical guides (Z, which are V- shaped in cross-section, and arapping-engine maybe connected to said plate 20, as in Letters Patent of the United States dated July 24:, 1900, and bearing number 654,292. It will be understood that in this modification or arrangement the frame 2O and the patterncarrier at are rigidly connected together and that they have no bodily motion in a lateral or horizontal direction during the drawing of the pattern, even though the Vibrator be in operation at the time, whereby the sand is prevented from adhering to the pattern, as in said Letters Patent last mentioned. It is remarked that the sand is prevented from sticking to the wood plate a by coating or'soaking the same in paraffin, preferably by impregnating the board with the same or its equivalent.

Figs. 3 and 4 illustrate a modification wherein the wooden pattern-carrier a is rabbeted to set down inside a rabbet in the frame 20 and is detachably connected with said frame 20 by means of pivoted buttons 20- or the like. These buttons are semicircular in outline and are pivotally connected to the frame 20 by studs which extend through the frame and have their ends upset and the frame and plate are both recessed to permit of the rotation of the buttons to bring their straight edges in line and over the edges of the rabbets in the frame for the introduction and removal of the plate a and the turning thereof to clamp the plate a and the frame 20 together to form a rigid structure to enable the vibrator to perform its function. It will be understood that there are a number of the buttons 20" used to retain the plate a in place on the frame.

The invention may be embodied in forms other than those herein shown. Hence I do not limit myself to the forms shown.

hat is claimed as new, and for which Letters Patent of the United States are desired, 1s-

In a molding-machine, the combination of a wooden pattern-carrying plate, a metal reinforcing frame or plate on which said carrier bears, posts for connecting said metal frame or plate with a part of the machine which, during the ramming, has no mot-ion relatively to the pattern-carrier, an open metal frame rigidly connected with the wooden plate at the edges thereof, and a vibrator-engine connected with the last-named metal frame, substantially as described.

Signed at Schenectady, in the county of Schenectady and State of New York, this 21st day of September, A. D. 1901.

WILLIAM THOMAS CLARK.

\Vitnesses:

WILLIAM OSTRANDER, DANIEL PANGBURN. 

